Hui Fang JinEdison, NJ

7539475, May 26, 2009

Sep 16, 2005

11/229348

Rajiv Laroia - Basking Ridge NJ, US
Junyi Li - Bedminster NJ, US
Hui Jin - Annandale NJ, US

QUALCOMM Incorporated - San Diego CA

H04B 1/10
H04B 1/04
H04B 17/00

455296, 4552261, 455222, 455 6713, 4551142, 4551151, 370317, 370344

Special DC tone treatment in a wireless communications system, e. g. , an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit on other downlink tones. Wireless terminals measure received signal on the downlink DC tone during the time of suspended DC tone transmission, estimate self-interference and apply a correction to other received downlink DC tones. In the uplink DC tone interference is a composite of the assigned wireless terminal transmitter's baseband/RF conversion self-interference and air link noise. During one symbol interval of an N symbol interval dwell, the uplink DC tone is reserved for a special modulation symbol, which is a predetermined function of the other N−1 modulation symbols. At the base station, its receiver receives a set of modulation symbols conveyed by the uplink DC tone for a dwell, calculates the average DC component and corrects the received N−1 modulation symbols.

7706456, Apr 27, 2010

Mar 7, 2006

11/370219

Rajiv Laroia - Basking Ridge NJ, US
Hui Jin - Clinton NJ, US
Tom Richardson - South Orange NJ, US
Junyi Li - Bedminster NJ, US

QUALCOMM Incorporated - San Diego CA

H04K 1/10

375260

A stream of modulation symbols from a zero symbol rate (ZSR) coding/modulation module and a stream of modulation symbols from another type of coding/modulation module are input into an interweaver module. The interweaver module mixes the two input streams when assigning modulation symbols to be communicated in a segment. If a ZSR modulation symbol is non-zero, the ZSR modulation symbol is allocated a transmission position. If the ZSR modulation symbol is a zero modulation symbol, the modulation symbol from the other coding/modulation module is allocated the transmission position. The non-zero modulation symbols from the ZSR module are higher in power than the non-zero modulation symbols from the other module, thus facilitating detection and recovery.

7773679, Aug 10, 2010

Sep 16, 2005

11/229067

Rajiv Laroia - Basking Ridge NJ, US
Junyi Li - Bedminster NJ, US
Hui Jin - Annandale NJ, US

QUALCOMM Incorporated - San Diego CA

H04K 1/10

375260, 370210

Special DC tone treatment in a wireless communications system, e. g. , an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit on other downlink tones. Wireless terminals measure received signal on the downlink DC tone during the time of suspended DC tone transmission, estimate self-interference and apply a correction to other received downlink DC tones. In the uplink DC tone interference is a composite of the assigned wireless terminal transmitter's baseband/RF conversion self-interference and air link noise. During one symbol interval of an N symbol interval dwell, the uplink DC tone is reserved for a special modulation symbol, which is a predetermined function of the other N−1 modulation symbols. At the base station, its receiver receives a set of modulation symbols conveyed by the uplink DC tone for a dwell, calculates the average DC component and corrects the received N−1 modulation symbols.

7773703, Aug 10, 2010

Sep 16, 2005

11/229068

Rajiv Laroia - Basking Ridge NJ, US
Junyi Li - Bedminster NJ, US
Hui Jin - Annandale NJ, US

QUALCOMM Incorporated - San Diego CA

H03D 1/04

375346, 375260

Special DC tone treatment in a wireless communications system, e. g. , an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit on other downlink tones. Wireless terminals measure received signal on the downlink DC tone during the time of suspended DC tone transmission, estimate self-interference and apply a correction to other received downlink DC tones. In the uplink DC tone interference is a composite of the assigned wireless terminal transmitter's baseband/RF conversion self-interference and air link noise. During one symbol interval of an N symbol interval dwell, the uplink DC tone is reserved for a special modulation symbol, which is a predetermined function of the other N-1 modulation symbols. At the base station, its receiver receives a set of modulation symbols conveyed by the uplink DC tone for a dwell, calculates the average DC component and corrects the received N-1 modulation symbols.

7885293, Feb 8, 2011

Sep 19, 2005

11/230305

Rajiv Laroia - Basking Ridge NJ, US
Hui Jin - Annandale NJ, US
Tom Richardson - South Orange NJ, US
Junyi Li - Bedminster NJ, US

QUALCOMM Incorporated - San Diego CA

H04J 3/16
H04M 3/00

370468, 455419

A base station selects a maximum rate option indicator value for an uplink communications segment, e. g. , uplink traffic channel segment, and transmits the selected indicator value, e. g. , as part of the assignment message. The maximum rate option indicator value indicates to the wireless terminal a maximum allowed data rate option that the wireless terminal is permitted to use for the corresponding assigned uplink communications segment, the wireless terminal determining the actual uplink rate option used. Each uplink data rate option corresponds to: a number of information bits to be communicated in an uplink communication segment, a coding rate, and a modulation method. Some embodiments include multiple types of maximum uplink rate option indicators, e. g. , a first type using a single bit and a second type using at least three bits. Different modulation methods are, in some embodiments, used for communicating the different types of maximum uplink rate option indicators.

7894324, Feb 22, 2011

Sep 19, 2005

11/230300

Rajiv Laroia - Basking Ridge NJ, US
Hui Jin - Annandale NJ, US
Tom Richardson - South Orange NJ, US
Junyi Li - Bedminster NJ, US

QUALCOMM Incorporated - San Diego CA

H04J 11/00

370203, 370206, 370208, 370480, 375260

A wireless terminal includes an uplink rate option indicator in the same uplink channel segment with data, the rate option indicator providing transmission rate information about the data transmitted in the segment. The indicator value is represented by an energy pattern within the segment. Different energy patterns correspond to different indicator values. The number of indicator values is less than the number of possible uplink data rate options supported by the wireless terminal. A single indicator value represents different uplink data rate options, at different times, as a function of a received maximum data rate option and/or type of assignment message. The maximum data rate option and/or assignment message was transmitted by the same base station receiving the indicator value; therefore, there is no ambiguity between wireless terminal and base station as to the interpretation of the uplink data rate option indicator value with respect to an individual uplink segment.

7936831, May 3, 2011

Sep 16, 2005

11/229040

Rajiv Laroia - Basking Ridge NJ, US
Hui Jin - Annandale NJ, US
Junyi Li - Bedminster NJ, US
Frank A. Lane - Asbury NJ, US
Tom Richardson - South Orange NJ, US

QUALCOMM Incorporated - San Diego CA

H04L 27/00

375259, 375295

Downlink traffic channel data rate options and methods of indicating to a wireless terminal a utilized downlink data rate option are described. The downlink traffic channel rate option for a segment is conveyed using an assignment signal and/or a block in the downlink traffic channel segment which is not used for user data. Downlink segment assignment signals in some implementations allocate fewer bits for rate option indication than are required to uniquely identify each option. In some implementations low rate options, e. g. , using QPSK, are uniquely identified via assignment signals. Higher rate options, e. g. , using QAM16 modulation, are conveyed via the distinct information block in the downlink traffic segment using a first coding/modulation method. Still higher rate options, e. g. , using QAM16, QAM64, or QAM256, are conveyed via the information block in the segment using a second coding/modulation method which is applied to the rate option information.

7974253, Jul 5, 2011

Sep 19, 2005

11/230303

Rajiv Laroia - Basking Ridge NJ, US
Hui Jin - Annandale NJ, US
Tom Richardson - South Orange NJ, US

QUALCOMM Incorporated - San Diego CA

H04B 7/216
G08C 15/00
H04J 3/14
H04J 1/16
H04W 72/00

370342, 370335, 370231, 370235, 455450

A base station selects and assigns uplink segments to specific wireless terminals. The base station estimates potential system interference levels, selects, assigns, and transmits a maximum uplink rate indicator value to a wireless terminal indicating the maximum uplink data rate that the wireless terminal is permitted to use. The wireless terminal receives the maximum data rate indicator and selects an uplink data rate to use which is less than or equal to the maximum data rate indicator level. The selection includes consideration of data amounts, data importance, communications channel quality, changes affecting the channel and/or power information. The wireless terminal encodes information indicative of the selected used rate with the user data/information to be transmitted by placing additional energy on a subset of the uplink signals. The base station receives the uplink signals including user data/information and data rate. The base station extracts the data rate used and utilizes the data rate to demodulate and decode the uplink user data/information.